XML 77 R67.htm IDEA: XBRL DOCUMENT v3.25.3
Fixed Maturity Securities In An Unrealized Loss Position (Securities in an Unrealized Loss Position) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months $ 2,652,584 $ 5,460,931
Gross Unrealized Losses, Less than 12 Months 43,295 82,882
Fair Value, 12 Months or Greater 5,064,620 7,086,937
Gross Unrealized Losses, 12 Months or Greater 457,383 625,846
Fair Value, Total 7,717,204 12,547,868
Gross Unrealized Losses, Total 500,678 708,728
U.S. government and government agency    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 797,397 767,515
Gross Unrealized Losses, Less than 12 Months 9,950 9,637
Fair Value, 12 Months or Greater 261,701 560,260
Gross Unrealized Losses, 12 Months or Greater 9,729 33,226
Fair Value, Total 1,059,098 1,327,775
Gross Unrealized Losses, Total 19,679 42,863
State and municipal    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 124,377 348,116
Gross Unrealized Losses, Less than 12 Months 1,781 8,027
Fair Value, 12 Months or Greater 1,129,946 1,411,761
Gross Unrealized Losses, 12 Months or Greater 42,313 81,430
Fair Value, Total 1,254,323 1,759,877
Gross Unrealized Losses, Total 44,094 89,457
Mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 639,327 1,541,464
Gross Unrealized Losses, Less than 12 Months 5,456 21,326
Fair Value, 12 Months or Greater 948,076 1,060,823
Gross Unrealized Losses, 12 Months or Greater 134,882 171,734
Fair Value, Total 1,587,403 2,602,287
Gross Unrealized Losses, Total 140,338 193,060
Asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 428,088 411,763
Gross Unrealized Losses, Less than 12 Months 1,515 4,613
Fair Value, 12 Months or Greater 550,779 626,237
Gross Unrealized Losses, 12 Months or Greater 18,713 36,899
Fair Value, Total 978,867 1,038,000
Gross Unrealized Losses, Total 20,228 41,512
Corporate    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 434,595 1,791,970
Gross Unrealized Losses, Less than 12 Months 3,389 21,346
Fair Value, 12 Months or Greater 1,841,143 2,951,377
Gross Unrealized Losses, 12 Months or Greater 67,888 135,117
Fair Value, Total 2,275,738 4,743,347
Gross Unrealized Losses, Total 71,277 156,463
Foreign government    
Debt Securities, Available-for-sale [Line Items]    
Fair Value, Less than 12 Months 228,800 600,103
Gross Unrealized Losses, Less than 12 Months 21,204 17,933
Fair Value, 12 Months or Greater 332,975 476,479
Gross Unrealized Losses, 12 Months or Greater 183,858 167,440
Fair Value, Total 561,775 1,076,582
Gross Unrealized Losses, Total $ 205,062 $ 185,373